David Fincher's 2007 crime drama Zodiac, widely regarded as one of the finest true-crime films ever made, is now streaming free on Pluto TV, nearly two decades after its release. Rather than focusing on the killer's crimes themselves, the film centres on the obsessive investigation and psychological toll placed on the journalists and detectives who spent years chasing an unidentified serial murderer, making it a distinctive entry in the genre.

The film dramatises the real-life Zodiac killings that terrorised the San Francisco Bay Area during the late 1960s and 1970s, starring Jake Gyllenhaal as cartoonist Robert Graysmith, Robert Downey Jr. as reporter Paul Avery, and Mark Ruffalo as police inspector Dave Toschi. As the killer taunts authorities with coded letters and phone calls, the case slowly consumes those pursuing it: Avery descends into drug and alcohol abuse, Toschi is demoted, and Graysmith loses his job and marriage to his all-consuming fixation, with the case never receiving a definitive resolution.